MySQL AI User Guide
The rpd_columns table provides column
encoding information for columns of tables loaded in the MySQL AI Engine.
The rpd_columns table has these columns:
TABLE_ID
A unique identifier for the table.
COLUMN_ID
A unique identifier for the table column.
NDV
The number of distinct values in the column.
ENCODING
The type of encoding used.
DATA_PLACEMENT_INDEX
The data placement key index ID associated with the column. Index value ranges from 1 to 16. NULL indicates that the column is not defined as a data placement key.
DICT_SIZE_BTYES
The dictionary size per column, in bytes.
The rpd_columns table is read-only.